Method of forming corrugated plates



Nov. 11, 1941.

R. J. BARROW 2,262,086

METHOD OF FORMING CORRUGATED PLATES Filed Jan. 20, 1940 Patented Nov. 11, 1941 Q METHOD OF FORMING CORRUGATED PLATES Russell J. Barrow, Columbiana, Ohio, assignor to The Columbiana Boiler Company, Columbiana,

Ohio, a corporation of Ohio Application January 20, 1940, Serial No. 314,869.

2 Claims. (01.113-116) This invention relates to an improvement in a method of forming corrugated panels having a flat margin.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this specification, with the understanding, however, that the invention is not to be confined to any strict conformity with the showing of the drawing but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawing:

Fig. 1 is a view in side elevation of a box constructed in accordance with the present invention, the central portion of the box being broken away.

Fig. 2 is a view in end elevation of the box.

Fig. 3 is a sectional view taken substantially on the line 33 of Fig. 1.

Fig. 4 is a sectional view taken substantially on the line 44 of Fig. 1.

Fig. 5 is a'sectional view taken substantially on the line 5-5 of Fig. 1.

Fig. 6 is a view in perspective of a portion of the top edge of a wall of the box showing the} manner in which the edge is slit prior to the flattening of the corrugations to form a flat top edge panel.

Referring now more particularly to the drawing, it will be seen that the present box structure is made up of longitudinally extending side walls I and end walls 2, such walls being joined together by a top 3.

In accordance with the present invention, the wrought metal vertical walls of the box are initially pressed or shaped to have transverse corrugations 4 which extend the entire height of each wall from the upper to the lower edges thereof. These sheet metal plates are then split from their topedges as indicated at 5 in Fig. 6, the splits being extended, along the ridges of the corrugations to a predetermined extent. After such splitting of the top edges of the vertical corrugated walls, the split edge portion is subjected to pressure in a suitable pressing machine whereby to flatten out the top edge of the wall so as to form a longitudinally extending top panel 6, the top edge of which is in a straight line and the inner side of which panel is in the plane of the inner sides of the valley portions of the corrugations as shown in Fig. 4. Thus each vertical wall of the box is provided from its bottom edge to adjacent its top edge. with 'reinforcing corrugations, the upper ends of the corrugations merging into the flat panel whichis formed to facilitatejoining the top edge of such panel with an adjacent bottom edge of the top 3.

After flattening out the top edge portion of each vertical wall to form the panel 6, the splits 5 may be closed by welding.

The top 3 of the box has a central portion 1 and the two end portions 8 and these end portions are pressed to have inwardly directed top and side flanges 9 and 10, while the longitudinal sides of the central portion 1 are turned downwardly to form the short vertical walls I I. The edges of the portions 9 and I!) of the ends of the top are butt-welded against the adjacent end edges of the top central portion and the lower edge of each end wall portion is butt-welded against the topedge of an end wall 2. Each end wall has a turned corner as indicated at 12, the top edge of which is engaged by a portion of the bottom edge of a side flange ll] of the adjacent top end portion 8, and the edges of these turned corners are butt-welded, as indicated at l3 to the vertical edges of the side walls I. The bottom edges of the portion ll of the central part of the top unit is also butt-welded with the top edge of the flattened panel 6 of a side wall, as indicated at M.

With this method of forming the walls and top and butt-welding them together, it will be not-ed that no seams are formed which occur in the corners or form corners of the box. In annealing boxes as hereinbefore constructed, the seams or joints between the walls are located in the corners of the box and such corner seams form weak points or places which do not satisfactorily stand up under the stresses to which the box is subjected. However, in the present construction where the seams are removed from the corners, a much stronger and more durable box structure is obtained because allowance is made for expansion and contraction without imposing stresses upon the welds.

For the purpose of facilitating handling of the box, there are provided the side wall handles 15. These handles are in the form of pieces of strap iron which are disposed across and in contact with the outer or top ridges of two adjacent corrugations as is clearly shown in Fig. 3, to which ridges the piece is welded as indicated at 16. This provides a flat handle with which lifting hooks may be readily engaged, which is out of the way and which takes advantage of the adjacent depression of the corrugation to provide the necessary opening for the reception of a lifting hook.

From the foregoing, it will be readily apparent that there has here been disclosed a novel improved form of annealing box which, because of its construction and the manner in which the units thereof are assembled, will have a long life of service and in addition, there is provided a novel handle means for facilitating the connection of lifting hooks with the box.

What is claimed is:

1. The method of forming a corrugated plate having a fiat edge panel, which comprises shaping a fiat plate to have corrugation ribs extending entirely transversely thereof, then cutting the adjacent ridges of alternate corrugations obliquely at the ends of the corrugations to remove a portion of the plate and form a substantially V-shaped slot opening through the adjacent edge of the plate, then pressing the plate fiat along the edge in which said slots are formed to bring the edges of the V-slots together and form a flat narrow panel extending along the edge of the plate and perpendicularly to the corrugationls, and finally welding together the said edges of the slots.

2. The method of forming a corrugated plate, having a flat panel extending along one edge, which comprises shaping a fiat plate to have continuous corrugated ribs extending entirely transversely thereof, then cutting off the adjacent ridges of alternate corrugations from a point a substantial distance inwardly of the edge along which the panel is to be formed and directing the cutting of the ridges lengthwise and obliquely of the corrugations toward the adja- RUSSELL JQBARROW. 

